/Engine/Plugins/Experimental/PCG/Source/PCG/Public/PCGSubgraph.h
Derived classes must implement this to communicate dependencies on external actors
virtual void GetTrackedActorKeys ( [FPCGActorSelectionKeyToSettingsMap](API\Plugins\PCG\FPCGActorSelectionKeyToSettingsM-) & OutKeysToSettings, [TArray](API\Runtime\Core\Containers\TArray)< [TObjectPtr](API\Runtime\Core\Delegates\TObjectPtr)< const [UPCGGraph](API\Plugins\PCG\UPCGGraph) >> & OutVisitedGraphs ) const